Drill-rod.



No. sof/mz. PATBNTED DEG. 12, 1905. J. VON GUNTEN.

DRILL Ron.

APPLICATION FILED FEB. 18. 1905.

Jaca Mn uniem @Helmut NITED sTATEs PATENT OEEIOE.

JACOB VON GUNTEN, OF MASSILLON, OHIO.

DRILL-Roo.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed February 18, 1905. Serial No. 246,336.

To all whom, it pta/y concern:

Be it known that I, J AcoB VON GUNTEN, a citizen of the United States, residing at Massillon, in the county of Stark and State of Ohio,

have invented certain new and useful Improvements in-Drill-Rods; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the numerals of reference marked thereon, in which- Figure 1 is a view showing portions of two sections of a drill-rod connected together. Fig. 2 is a view showing a portion of one section of drill-rod and illustrating the endstrengthening tube detached. Fig. 3 is a partial longitudinal section of a drill-rod section, showing the end-strengthening tube properly located and the material placed in position to be heated and the strengthening-tube secured to the end of the drill-rod proper. Fig. 4 is a view showing a portion of a drill-rod and illustrating the strengthening-tube properly located with reference to the end of the drillro It is well understood that drill -rods are preferably formed hollow for the purpose of decreasing the weight of the drill-rod proper, and of course the thinner the shell of the drillrod sections the lighter, and when a large number of drill-rod sections are connected together to reach the bottom of a deep well the rod will not be hard to operate by reason of its weight. In the operation of drilling deep wells it is necessary to add sections from time to time as the depth of the well increases. It is also necessary in removing the rod-sections to disconnect them,. and in order to handle the same with ease tongs are applied to hold the drill-rod proper, which tongs must necessarily grip with considerable force the pipe-section operated upon, and by reason of the force of the grip the pipe-section when formed thin or of the same thickness atits ends as the balance of the sections the hollow rod is liable to be forced out of round, or, in other words bent, so that in many instances it is very difficult to remove the coupling-collars or to adjust the coupling-collars to connect two sections of drill-rod together.

In the accompanying drawings, 1 represents the drill-rod sections, which are formed of any desired and convenient length and for the purpose above stated are formed of a light shell and their ends screw-threaded for the purpose of providing a means for connecting the sections together by the coupling 2. However, the present invention has no specific relation to the manner of coupling the sections together, and hence have illustrated the sections coupled together by an ordinary internal screw-threaded collar 2. In coupling drill-rod sections together it is necessary to provide screw-threads of suiicient depth to properly hold the sections together and prevent any stripping Of the threads during the time the drill-rod is being operated upon. This cutting of the threads has a tendency to weaken the end shells of the various pipe or rod sections, and I have discovered from long experience that great diiiculty is encountered by reason of the ends breaking by reason of the cuts of the screw-threads. For the purpose of avoiding the above-mentioned dificulties I have provided short tubes of adiameter less than the diameter of the rod-sections proper and of a length greater than the length ofthe screw-threads upon the ends of the pipesections 1, by which arrangement the ends of the pipe-sections are brazed or formed rigid, owing to the increased thickness of metal, and for the purpose of providing what might be termed integral thickened inner portions at the ends of the tube-sections the short tubes 3 are vbrazeol or otherwise connected in such a manner that they will not become displaced and are located so that they offer a resistance to any crushing pressure that may be brought upon the outer surface or periphery of the pipe-sections 1. For the purpose of illustrating a way of securing the short sections 3 said sections are provided with any number of apertures 4: and the tube 3 placed in the position illustrated in Fig. 3, which is its normal position, and said inner tube filled with boraX and brass or like metal, after which the ends of the pipe-sections 1, together with the inner pipe 3, are heated to such a degree that the brass or other metal will be melted and tind its way through the apertures 4., thereby brazing the inner periphery of the pipe-section 1 and the outer periphery of the short tube 3 together.

By providing a hollow drill-rod and forming the same hollow throughout its entire length and at the points where the sections are coupled together and providing a valve at the bottom or lower portion of the lower section just above the drill-bit the loose material is forced upward through the hollow drill-rod sections during the operation of the drill-rod, thereby continuously removing all IIO loose material and without the necessity of ertures, and means for holding the short tubes removing the drill-rod from time to time and in fixed position with theends of the drill-rod, using what is known as a sand-pump. substantially as set forth.

Having fully described my inventiomwhat In testimony that I claim the above I have 5 I claim as new, and desire to secure by Letters hereunto subscribed my name in the presence 15 Patent, isof two Witnesses.

A drill-rod formed in sections, and the sec- JACOB VON GUNTEN. tions provided with screw-threaded ends,short Witnesses: tubes located in the ends of the drill-rod sec- L. M. BOND,

I0 tions, and said short tubes provided with ap- F. W. BOND. 

